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my gun has a mount with stock screw holes for a reel. just under the gun, infront of the trigger, your left hand can press the button while aiming, but this is a two hand operation even on a reef gun, you may not like this.
most euroguns have either a stock mounting hole option, or an adapter of some sort for a reel.
the standard aluminum scope/flashlight mount fits on the Omer Cobra and screws into the reel mount holes (remove the reel mount first) using the stock screws that come with the gun (no enlarging of stock holes to reuse reel mount), no modifications other than using a small piece of plastic undet the rear mount against the Laser to cause the beam to rise at roughly 12 feet to match the bolt.(Currently used with 1 wrap of line = 12 ft range for now) further away and the spot is above the bolt shot, closer and it is under. this range is easily adjustable by either tightening or loosening the mount bolts in the rear.

no scope or laser works with all ranges at all times, they have to be sighted in to work accurately.
as your range increases (multi bands, and multiple wraps, and the range must be adjusted accordingly)

no lashing, no ducktape, no strings, just a bolt on setup using a gun mount and a scuba laser pointer. it probably adds a little more weight than a reel with 90M of Nylon line, I will send you a pic when I put it on again. it is pretty straightforeward.

I feel that for practice it is not so impractical, but for hunting it makes the gun negatively bouyat more than I care to have.

(however, there is no better practice than hunting frequently, which would negate the need for a laser sight in the first place, unless you are a murky water, or cave specialist)

personally I feel that if you are spending more time on the dot, and less time on the shot, you are wasting your time. hunt wisely.

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